check_free_strict: New stricter cross function use after free check
[smatch.git] / cgcc
blobc075e5f1308e013f9d286d99bdcd3ae6b086ba4f
1 #!/usr/bin/perl -w
2 # -----------------------------------------------------------------------------
4 my $cc = $ENV{'REAL_CC'} || 'cc';
5 my $check = $ENV{'CHECK'} || 'sparse';
7 my $m32 = 0;
8 my $m64 = 0;
9 my $has_specs = 0;
10 my $gendeps = 0;
11 my $do_check = 0;
12 my $do_compile = 1;
13 my $gcc_base_dir;
14 my $verbose = 0;
16 while (@ARGV) {
17 $_ = shift(@ARGV);
18 # Look for a .c file. We don't want to run the checker on .o or .so files
19 # in the link run. (This simplistic check knows nothing about options
20 # with arguments, but it seems to do the job.)
21 $do_check = 1 if /^[^-].*\.c$/;
23 # Ditto for stdin.
24 $do_check = 1 if $_ eq '-';
26 $m32 = 1 if /^-m32$/;
27 $m64 = 1 if /^-m64$/;
28 $gendeps = 1 if /^-M$/;
30 if (/^-target=(.*)$/) {
31 $check .= &add_specs ($1);
32 $has_specs = 1;
33 next;
36 if ($_ eq '-no-compile') {
37 $do_compile = 0;
38 next;
41 if (/^-gcc-base-dir$/) {
42 $gcc_base_dir = shift @ARGV;
43 die ("$0: missing argument for -gcc-base-dir option") if !$gcc_base_dir;
44 next;
47 # If someone adds "-E", don't pre-process twice.
48 $do_compile = 0 if $_ eq '-E';
50 $verbose = 1 if $_ eq '-v';
52 my $this_arg = ' ' . &quote_arg ($_);
53 $cc .= $this_arg unless &check_only_option ($_);
54 $check .= $this_arg;
57 if ($gendeps) {
58 $do_compile = 1;
59 $do_check = 0;
62 if ($do_check) {
63 if (!$has_specs) {
64 $check .= &add_specs ('host_arch_specs');
65 $check .= &add_specs ('host_os_specs');
68 $gcc_base_dir = qx($cc -print-file-name=) if !$gcc_base_dir;
69 $check .= " -gcc-base-dir " . $gcc_base_dir if $gcc_base_dir;
71 print "$check\n" if $verbose;
72 if ($do_compile) {
73 system ($check);
74 } else {
75 exec ($check);
79 if ($do_compile) {
80 print "$cc\n" if $verbose;
81 exec ($cc);
84 exit 0;
86 # -----------------------------------------------------------------------------
87 # Check if an option is for "check" only.
89 sub check_only_option {
90 my ($arg) = @_;
91 return 1 if $arg =~ /^-W(no-?)?(default-bitfield-sign|one-bit-signed-bitfield|cast-truncate|bitwise|typesign|context|undef|ptr-subtraction-blows|cast-to-as|decl|transparent-union|address-space|enum-mismatch|do-while|old-initializer|non-pointer-null|paren-string|return-void|designated-init|sparse-all)$/;
92 return 1 if $arg =~ /^-v(no-?)?(entry|dead)$/;
93 return 0;
96 # -----------------------------------------------------------------------------
97 # Simple arg-quoting function. Just adds backslashes when needed.
99 sub quote_arg {
100 my ($arg) = @_;
101 return "''" if $arg eq '';
102 return join ('',
103 map {
104 m|^[-a-zA-Z0-9._/,=]+$| ? $_ : "\\" . $_;
105 } (split (//, $arg)));
108 # -----------------------------------------------------------------------------
110 sub integer_types {
111 my ($char,@dummy) = @_;
113 my %pow2m1 =
114 (8 => '127',
115 16 => '32767',
116 32 => '2147483647',
117 64 => '9223372036854775807',
118 128 => '170141183460469231731687303715884105727',
120 my @types = (['SCHAR',''], ['SHRT',''], ['INT',''], ['LONG','L'], ['LONG_LONG','LL'], ['LONG_LONG_LONG','LLL']);
122 my $result = " -D__CHAR_BIT__=$char";
123 while (@types && @_) {
124 my $bits = shift @_;
125 my ($name,$suffix) = @{ shift @types };
126 die "$0: weird number of bits." unless exists $pow2m1{$bits};
127 $result .= " -D__${name}_MAX__=" . $pow2m1{$bits} . $suffix;
129 return $result;
132 # -----------------------------------------------------------------------------
134 sub float_types {
135 my ($has_inf,$has_qnan,$dec_dig,@bitsizes) = @_;
136 my $result = " -D__FLT_RADIX__=2";
137 $result .= " -D__FINITE_MATH_ONLY__=" . ($has_inf || $has_qnan ? '0' : '1');
138 $result .= " -D__DECIMAL_DIG__=$dec_dig";
140 my %constants =
141 (24 =>
143 'MIN' => '1.17549435e-38',
144 'MAX' => '3.40282347e+38',
145 'EPSILON' => '1.19209290e-7',
146 'DENORM_MIN' => '1.40129846e-45',
148 53 =>
150 'MIN' => '2.2250738585072014e-308',
151 'MAX' => '1.7976931348623157e+308',
152 'EPSILON' => '2.2204460492503131e-16',
153 'DENORM_MIN' => '4.9406564584124654e-324',
155 64 =>
157 'MIN' => '3.36210314311209350626e-4932',
158 'MAX' => '1.18973149535723176502e+4932',
159 'EPSILON' => '1.08420217248550443401e-19',
160 'DENORM_MIN' => '3.64519953188247460253e-4951',
162 113 =>
164 'MIN' => '3.36210314311209350626267781732175260e-4932',
165 'MAX' => '1.18973149535723176508575932662800702e+4932',
166 'EPSILON' => '1.92592994438723585305597794258492732e-34',
167 'DENORM_MIN' => '6.47517511943802511092443895822764655e-4966',
171 my @types = (['FLT','F'], ['DBL',''], ['LDBL','L']);
172 while (@types) {
173 my ($mant_bits,$exp_bits) = @{ shift @bitsizes };
174 my ($name,$suffix) = @{ shift @types };
176 my $h = $constants{$mant_bits};
177 die "$0: weird number of mantissa bits." unless $h;
179 my $mant_dig = int (($mant_bits - 1) * log (2) / log (10));
180 my $max_exp = 1 << ($exp_bits - 1);
181 my $min_exp = 3 - $max_exp;
182 my $max_10_exp = int ($max_exp * log (2) / log (10));
183 my $min_10_exp = -int (-$min_exp * log (2) / log (10));
185 $result .= " -D__${name}_MANT_DIG__=$mant_bits";
186 $result .= " -D__${name}_DIG__=$mant_dig";
187 $result .= " -D__${name}_MIN_EXP__='($min_exp)'";
188 $result .= " -D__${name}_MAX_EXP__=$max_exp";
189 $result .= " -D__${name}_MIN_10_EXP__='($min_10_exp)'";
190 $result .= " -D__${name}_MAX_10_EXP__=$max_10_exp";
191 $result .= " -D__${name}_HAS_INFINITY__=" . ($has_inf ? '1' : '0');
192 $result .= " -D__${name}_HAS_QUIET_NAN__=" . ($has_qnan ? '1' : '0');;
194 foreach my $inf (sort keys %$h) {
195 $result .= " -D__${name}_${inf}__=" . $h->{$inf} . $suffix;
198 return $result;
201 # -----------------------------------------------------------------------------
203 sub define_size_t {
204 my ($text) = @_;
205 # We have to undef in order to override check's internal definition.
206 return ' -U__SIZE_TYPE__ ' . &quote_arg ("-D__SIZE_TYPE__=$text");
209 # -----------------------------------------------------------------------------
211 sub add_specs {
212 my ($spec) = @_;
213 if ($spec eq 'sunos') {
214 return &add_specs ('unix') .
215 ' -D__sun__=1 -D__sun=1 -Dsun=1' .
216 ' -D__svr4__=1 -DSVR4=1' .
217 ' -D__STDC__=0' .
218 ' -D_REENTRANT' .
219 ' -D_SOLARIS_THREADS' .
220 ' -DNULL="((void *)0)"';
221 } elsif ($spec eq 'linux') {
222 return &add_specs ('unix') .
223 ' -D__linux__=1 -D__linux=1 -Dlinux=linux';
224 } elsif ($spec eq 'openbsd') {
225 return &add_specs ('unix') .
226 ' -D__OpenBSD__=1';
227 } elsif ($spec eq 'unix') {
228 return ' -Dunix=1 -D__unix=1 -D__unix__=1';
229 } elsif ( $spec =~ /^cygwin/) {
230 return &add_specs ('unix') .
231 ' -D__CYGWIN__=1 -D__CYGWIN32__=1' .
232 " -D'_cdecl=__attribute__((__cdecl__))'" .
233 " -D'__cdecl=__attribute__((__cdecl__))'" .
234 " -D'_stdcall=__attribute__((__stdcall__))'" .
235 " -D'__stdcall=__attribute__((__stdcall__))'" .
236 " -D'_fastcall=__attribute__((__fastcall__))'" .
237 " -D'__fastcall=__attribute__((__fastcall__))'" .
238 " -D'__declspec(x)=__attribute__((x))'";
239 } elsif ($spec eq 'i86') {
240 return (' -Di386=1 -D__i386=1 -D__i386__=1' .
241 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
242 &float_types (1, 1, 21, [24,8], [53,11], [64,15]) .
243 &define_size_t ($m64 ? "long unsigned int" : "unsigned int") .
244 ' -D__SIZEOF_POINTER__=' . ($m64 ? '8' : '4'));
245 } elsif ($spec eq 'sparc') {
246 return (' -Dsparc=1 -D__sparc=1 -D__sparc__=1' .
247 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
248 &float_types (1, 1, 33, [24,8], [53,11], [113,15]) .
249 &define_size_t ($m64 ? "long unsigned int" : "unsigned int") .
250 ' -D__SIZEOF_POINTER__=' . ($m64 ? '8' : '4'));
251 } elsif ($spec eq 'sparc64') {
252 return (' -Dsparc=1 -D__sparc=1 -D__sparc__=1 -D__sparcv9__=1 -D__sparc64__=1 -D__arch64__=1 -D__LP64__=1' .
253 &integer_types (8, 16, 32, 64, 64, 128) .
254 &float_types (1, 1, 33, [24,8], [53,11], [113,15]) .
255 &define_size_t ("long unsigned int") .
256 ' -D__SIZEOF_POINTER__=8');
257 } elsif ($spec eq 'x86_64') {
258 return (' -Dx86_64=1 -D__x86_64=1 -D__x86_64__=1' . ($m32 ? '' : ' -D__LP64__=1') .
259 &integer_types (8, 16, 32, $m32 ? 32 : 64, 64, 128) .
260 &float_types (1, 1, 33, [24,8], [53,11], [113,15]) .
261 &define_size_t ($m32 ? "unsigned int" : "long unsigned int") .
262 ' -D__SIZEOF_POINTER__=' . ($m32 ? '4' : '8'));
263 } elsif ($spec eq 'ppc') {
264 return (' -D__powerpc__=1 -D_BIG_ENDIAN -D_STRING_ARCH_unaligned=1' .
265 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
266 &float_types (1, 1, 21, [24,8], [53,11], [113,15]) .
267 &define_size_t ($m64 ? "long unsigned int" : "unsigned int") .
268 ' -D__SIZEOF_POINTER__=' . ($m64 ? '8' : '4'));
269 } elsif ($spec eq 'host_os_specs') {
270 my $os = `uname -s`;
271 chomp $os;
272 return &add_specs (lc $os);
273 } elsif ($spec eq 'host_arch_specs') {
274 my $arch = `uname -m`;
275 chomp $arch;
276 if ($arch =~ /^(i.?86|athlon)$/i) {
277 return &add_specs ('i86');
278 } elsif ($arch =~ /^(sun4u)$/i) {
279 return &add_specs ('sparc');
280 } elsif ($arch =~ /^(x86_64)$/i) {
281 return &add_specs ('x86_64');
282 } elsif ($arch =~ /^(ppc)$/i) {
283 return &add_specs ('ppc');
284 } elsif ($arch =~ /^(sparc64)$/i) {
285 return &add_specs ('sparc64');
287 } else {
288 die "$0: invalid specs: $spec\n";
292 # -----------------------------------------------------------------------------